When a light passenger plane flew off course some time ago, it crashed in the mountains and its pilot was killed. The only passengers, a young woman and her two baby daughters, were unhurt. It was the middle of winter. Snow lay thick on the ground. The woman knew that the nearest village was miles away. When it grew dark, she turned a suitcase into a bed and put the children inside it, covering them with all the clothes she could find. During the night, it got terribly cold. The woman kept as near as she could to the children and even tried to get into the case herself, but it was too small. Early next morning, she heard planes passing overhead and wondered how she could send a signal. Then she had an idea. She stamped out the letters 'SOS' in the snow. Fortunately, a pilot saw the signal and sent a message by radio to the nearest town. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
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1． flew off course,飞离航线。
Our office is off the main street.
During the storm, the ship went off course.
2． her two baby daughters, 她的两个女婴。
3． Snow Iay thick on the ground.地上积着厚厚的雪。
When I saw her yesterday, she lay ill in bed.
The old man lies ill and neglected in bed.
4．The woman kept as near as she could to the children…这位妇女尽可能地靠近孩子……
keep在这里表示“保持（某种状态）”。 as…as one can/could和 as…as possible同义，都表示“尽可能……”：
He got through as much food as he could and set out.
Tell Jim to come to my office as soon as he can.
5. She stamped out the letters‘SoS’ in the snow.她在雪地上踩
The writer has brought out another book.
He wrote out a long list of all the foods which were forbidden.
6. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash. 不久，一架直升飞机飞抵飞机
（2）It was not long before…为固定句型，表示“不久就……”（也可以用 It will not be long before…表示将来可能发生的事），
其含义与before long（不久）相近，只是before在课文这个句型中是连词，而在before long中为介词：
It was not long before they learnt the news.
It will not be long before he gets over his illness.
thick adj. 厚的
signal n. 信号
stamp v. 跺，踩
helicopter n. 直升飞机
scene n. 现场
survivor n. 幸存者
grow, turn, go, get, come, fall等动词均有“变成”的意思，但它们在用法上有时有差别。
He has grown fat.
He has grown to like studying mathematics.
It was growing hot.
Leaves will turn yellow in autumn.
Jasper hopes the stone Medusa will turn cars and their owners to stone.
A colony of be had turned the engine into a hive
Big Ben has rarely gone wrong.
Some foods go bad easily.
Things got so bad recently that he decided to go on a diet.
It's getting warmer and warmer.
Her dream to swim across the channel has come true.
You fell asleep while I was talking to you.
He fell ill last week, so he didn't come to your wedding.
A helicopter soon arrived on the scene to rescue the survivors.
These things were found at the scene of the murder.
A beautiful scene always makes me delighted.
I have just seen a sad scene.
A flew (1.1); crashed (1.2); was killed (1.2); grew dark (1.5); turned (1.6); put(1.6); could find (1.7); got (1.8); kept(1.8); could(1.8); tried to get(1.9); heard (1.9); wondered (1.10); could send (1.10); had(1.10); stamped out(1.11); saw(1.11); sent(1.11); arrived (1.12)
(Note: Other past tenses are descriptive, i.e. they do not indicate something that happened.)
1 grew/got/turned 2 fell 3 grew 4 turn/go 5come/become
6 grew 7 growing/getting…growing/get ting 8 got/grown
9 fell 10 come
1c 2a 3b 4d 5b 6a
7b 8b 9d 10d 11c 12c